2024 to become the year of cicadas as billions set to emerge in U.S. in rare double brood event

a cicada on a branch of a tree

In 2024, two different broods of cicadas—one with a 13-year cycle and the other with a 17-year cycle—will emerge simultaneously in a rare synchronized event. The last time this happened was in 1803. The billions of cicadas are expected to appear across the Midwest and Southeast, beginning in late April. This phenomenon is considered a once-in-a-lifetime event, with each specific pair of broods aligning their cycles only once every 221 years. The overlap of Brood XIII and Brood XIX, which occurred in central Illinois, is a rare occurrence. After 2024, these broods won’t sync up their emergences for another 221 years.

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